what does it mean when there is a number next to a variable This is the inverse function of an a n Hence a n a n means you look for a number b b which when multiplied n n times with itself results in a a For instance We know that 23 8 2 3 8 so 8 3 2 8 3 2 1 5 1 1 5 1 because 1 5 1 1 5 1 3 4 1 31607 3 4 1 31607
The number 5 is the coefficient on the variable a All this means is that 5 times a equals 65 If the directions were to solve were trying to find the number that when multiplied by 5 will give us 65 A letter or symbol that represents any member of a collection of two or more numbers is called a variable A letter or symbol that represents one specific number known or unknown is called a constant In example 1 the letter x is a variable since it can represent any of the numbers 0 1 2 3 4
what does it mean when there is a number next to a variable
what does it mean when there is a number next to a variable
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When one number is next to another number that is contained within parentheses it means that you need to multiply the two numbers together 3 2 6 Variables When a number is right next to a variable like n or x it means that you need to multiply the number by the variable 3n Multiplication Written in Different Ways Example 2 A mixture of explanations examples and practice problems to have you evaluating expressions with one variable in no time How to evaluate an expression with one variable Let s say we want to evaluate the expression a 4 Well first we need to know the value of the variable a
Variables in math are symbols often letters that represent different values in various situations They help us understand and solve problems with changing values For example when calculating total earnings at a job with an hourly wage plus tips a variable can represent the fluctuating tips making it easier to determine total income Definition of Subscript A small letter or number placed slightly lower than the normal text Examples the number 1 here A1 pronounced A sub 1 or just A 1 the letter m here xm pronounced x sub m or just x m Often used when we have a list of values Example Average x 1 x 2 x 3 x n n
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If you mean something like 7 3 I can answer that There are three ways to indicate multiplication an x sign a dot or a number in parentheses touching another number If it is not one of those and is more like 5 6 then it would be subtraction Rule Important 1 x 1 x x When you know that x 1 x you can move onto the next step What does it mean to multiply a number by an expression with variables Take for example the multiplication expression 3 2 x This expression describes how many times you have the factor 2 x It can be analyzed like this
This symbol has two main uses in mathematics is used when one or more numbers are to be subtracted for example 2 2 The symbol is also commonly used to show a minus or negative number such as 2 See our page on Subtraction for more or or A Coefficient is a number used to multiply a variable 4x means 4 times x so 4 is a coefficient Variables on their own without a number next to them actually have a coefficient of 1 x is really 1x Sometimes a coefficient is a letter like a or b instead of a number Example ax 2 bx c x is a variable
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what does it mean when there is a number next to a variable - Any time you see a number and a variable or two or more variables placed right next to each other like this it means that the number and the variable or the many variables are to be multiplied together When multiplying we use exponents For instance 5 5 52 Of course we can simplify this as 52 25